Rotor blade



FIG. 1 is a front perspective view of a rotor blade showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a bottom perspective view thereof.

The broken lines in the drawings depict portions of the rotor blade that form no part of the claimed design. 

CLAIM The ornamental design for a rotor blade, as shown and described. 